EP2355892B1 - Système de stimulation électrique implantable - Google Patents
Système de stimulation électrique implantable Download PDFInfo
- Publication number
- EP2355892B1 EP2355892B1 EP09791889.0A EP09791889A EP2355892B1 EP 2355892 B1 EP2355892 B1 EP 2355892B1 EP 09791889 A EP09791889 A EP 09791889A EP 2355892 B1 EP2355892 B1 EP 2355892B1
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- lead
- distal end
- proximal end
- proximal
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/04—Electrodes
- A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
- A61N1/0551—Spinal or peripheral nerve electrodes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3468—Trocars; Puncturing needles for implanting or removing devices, e.g. prostheses, implants, seeds, wires
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0606—"Over-the-needle" catheter assemblies, e.g. I.V. catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
- A61M25/0662—Guide tubes
- A61M25/0668—Guide tubes splittable, tear apart
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/04—Electrodes
- A61N1/05—Electrodes for implantation or insertion into the body, e.g. heart electrode
- A61N1/0526—Head electrodes
- A61N1/0529—Electrodes for brain stimulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2107/00—Four or more poles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
- H01R24/58—Contacts spaced along longitudinal axis of engagement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
- H01R25/003—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits the coupling part being secured only to wires or cables
Definitions
- the present invention is directed to the area of implantable electrical stimulation systems and methods of making and using the systems.
- the present invention is also directed to implantable electrical stimulation systems that include a lead with an increased number of electrodes disposed on a distal end of the lead without a corresponding increase in the lateral circumference of the distal end of the lead and the lead also including multiple proximal ends.
- Implantable electrical stimulation systems have proven therapeutic in a variety of diseases and disorders.
- spinal cord stimulation systems have been used as a therapeutic modality for the treatment of chronic pain syndromes.
- Deep brain stimulation has also been useful for treating refractory chronic pain syndromes and has been applied to treat movement disorders and epilepsy.
- Peripheral nerve stimulation has been used to treat chronic pain syndrome and incontinence, with a number of other applications under investigation.
- Functional electrical stimulation systems have been applied to restore some functionality to paralyzed extremities in spinal cord injury patients.
- electrical stimulation systems can be implanted subcutaneously to stimulate subcutaneous tissue including subcutaneous nerves such as the occipital nerve.
- a stimulator can include a control module (with a pulse generator), one or more leads, and an array of stimulator electrodes on each lead.
- the stimulator electrodes are in contact with or near the nerves, muscles, or other tissue to be stimulated.
- the pulse generator in the control module generates electrical pulses that are delivered by the electrodes to body tissue.
- an insertion kit in one embodiment, includes a lead and a splitable member configured and arranged for receiving the lead when implanting the lead into a patient.
- the lead has a distal end and at least two proximal ends.
- the lead includes a plurality of electrodes disposed at the distal end, a plurality of terminals disposed at the proximal ends, and a plurality of conductive wires coupling the plurality of electrodes electrically to the plurality of terminals.
- the lead also includes a junction coupling the distal end of the lead to the proximal ends of the lead.
- the splitable member defines a lumen for receiving the distal end of the lead and is configured and arranged to divide into at least two parts for removal of the splitable member from the lead upon implantation of the lead into the patient.
- an electrical stimulating system in another embodiment, includes a lead, a splitable member, a control module, and a connector.
- the lead has a distal end and at least two proximal ends.
- the lead includes a plurality of electrodes disposed at the distal end, a plurality of terminals disposed at the proximal ends, and a plurality of conductive wires coupling a portion of the plurality of electrodes electrically to the plurality of terminals.
- the lead also includes a junction coupling the distal end of the lead to the proximal ends of the lead.
- the splitable member is configured and arranged for receiving the lead when implanting the lead into a patient.
- the splitable member defines a lumen for receiving the distal end of the lead and is configured and arranged to divide into at least two parts for removal of the splitable member from the lead upon implantation of the lead into the patient.
- the control module is configured and arranged to electrically couple to the first proximal end and the at least one second proximal end.
- the control module includes a housing and an electronic subassembly disposed in the housing.
- the connector receives the lead and includes a connector housing and a plurality of connector contacts disposed in the connector housing.
- the connector housing defines a first port for receiving the first proximal end and at least one second port for receiving the at least one second proximal end of the lead.
- the connector contacts are configured and arranged to couple to at least one first terminal disposed at the first proximal end of the lead and to at least one second terminal disposed at each of the at the at least one second proximal ends.
- a neurostimulation lead in yet another embodiment, includes a distal lead body, at least two proximal lead bodies, and a junction coupling the distal lead body to the at least two proximal lead bodies.
- the distal lead body includes a distal end and a proximal end.
- the distal lead body includes a plurality of electrodes disposed on the distal end, a plurality of conductive wires extending from the electrodes to the proximal end, and a plurality of lumens extending from the electrodes to the proximal end. Each of the plurality of lumens is configured and arranged for receiving a plurality of the conductive wires.
- the at least two proximal lead bodies include a distal end and a proximal end.
- the at least two proximal lead bodies each include a plurality of terminals disposed on the proximal end, a plurality of conductive wires extending from the terminals to the distal end, and a plurality of lumens extending from the terminals to the distal end. Each of the plurality of lumens is configured and arranged for receiving a single conductive wire.
- the junction couples the proximal end of the distal lead body to the distal ends of each of the proximal lead bodies.
- Each of the conductive wires extending from the electrodes electrically couples to at least one conductive wire extending from at least one of the terminals disposed on at least one of the proximal lead bodies.
- the invention is defined by claim 1.
- the present invention is directed to the area of implantable electrical stimulation systems.
- the present invention is also directed to implantable electrical stimulation systems that include a lead with an increased number of electrodes disposed on a distal end of the lead without a corresponding increase in the lateral circumference of the distal end of the lead and the lead also including multiple proximal ends, as well as methods of making and implanting the leads and electrical stimulation systems.
- Suitable implantable electrical stimulation systems include, but are not limited to, a least one lead with one or more electrodes disposed on a distal end of the lead and one or more terminals disposed on one or more proximal ends of the lead.
- Leads include, for example, percutaneous leads, paddle leads, and cuff leads.
- Examples of electrical stimulation systems with leads are found in, for example, U.S. Patents Nos. 6,181,969 ; 6,516,227 ; 6,609,029 ; 6,609,032 ; and 6,741,892 ; and U.S. Patent Applications Serial Nos. 10/353,101 , 10/503,281 , 11/238,240 ; 11/319,291 ; 11/327,880 ; 11/375,638 ; 11/393,991 ; and 11/396,309 .
- FIG 1 illustrates schematically one embodiment of an electrical stimulation system 100.
- the electrical stimulation system includes a control module (e.g., a stimulator or pulse generator) 102 and at least one lead body 106 ("lead") coupled to the control module 102.
- Each lead 106 typically includes an array of electrodes 134.
- the control module 102 typically includes an electronic subassembly 110 and an optional power source 120 disposed in a sealed housing 114.
- the control module 102 typically includes a connector 144 ( Figure 2A , see also 222 and 250 of Figure 2B ) into which the proximal end of the one or more leads 106 can be plugged to make an electrical connection via conductive contacts on the control module 102 and terminals ( e.g.
- a lead is isodiametric along a longitudinal length of the lead body 106.
- one or more lead extensions 224 can be disposed between the one or more leads 106 and the control module 102 to extend the distance between the one or more leads 106 and the control module 102 of the embodiment shown in Figure 1 .
- the electrical stimulation system or components of the electrical stimulation system are typically implanted into the body of a patient.
- the electrical stimulation system can be used for a variety of applications including, but not limited to, brain stimulation, neural stimulation, spinal cord stimulation, muscle stimulation, and the like.
- the electrodes 134 can be formed using any conductive, biocompatible material. Examples of suitable materials include metals, alloys, conductive polymers, conductive carbon, and the like, as well as combinations thereof.
- the number of electrodes 134 in the array of electrodes 134 may vary. For example, there can be two, four, six, eight, ten, twelve, fourteen, sixteen, or more electrodes 134. As will be recognized, other numbers of electrodes 134 may also be used.
- the electrodes of one or more leads 106 are typically disposed in, or separated by, a non-conductive, biocompatible material such as, for example, silicone, polyurethane, polyetheretherketone ("PEEK”), epoxy, and the like or combinations thereof.
- the leads 106 may be formed in the desired shape by any process including, for example, molding (including injection molding), casting, and the like.
- the non-conductive material typically extends from the distal end of the one or more leads 106 to the proximal end of each of the one or more leads 106.
- Terminals are typically disposed at the proximal end of the one or more leads 106 of the electrical stimulation system 100 for connection to corresponding conductive contacts (e.g ., 214 in Figure 2A and 240 of Figure 2B ) in connectors ( e.g. , 144 in Figures 1-2A and 222 and 250 of Figure 2B ) disposed on, for example, the control module 102 (or to conductive contacts on a lead extension, an operating room cable, or an adaptor).
- Conductor wires extend from the terminals ( e.g ., 210 in Figure 2A and 236 of Figure 2B ) to the electrodes 134.
- one or more electrodes 134 are electrically coupled to a terminal (e.g ., 210 in Figure 2A and 236 of Figure 2B ).
- each terminal e.g ., 210 in Figure 2A and 236 of Figure 2B
- the conductor wires may be embedded in the non-conductive material of the lead 106 or can be disposed in one or more lumens (not shown) extending along the lead 106.
- two or more conductor wires may extend through a lumen.
- the lead 106 may also be one or more lumens (not shown) that open at, or near, the proximal end of the lead 106, for example, for inserting a stylet rod to facilitate placement of the lead 106 within a body of a patient. Additionally, there may also be one or more lumens (not shown) that open at, or near, the distal end of the lead 106, for example, for infusion of drugs or medication into the site of implantation of the one or more leads 106. In at least one embodiment, the one or more lumens may be flushed continually, or on a regular basis, with saline, epidural fluid, or the like. In at least some embodiments, the one or more lumens can be permanently or removably sealable at the distal end.
- leads are coupled to connectors disposed on control modules.
- a lead 208 is shown configured and arranged for insertion to the control module 102.
- the connector 144 includes a connector housing 202.
- the connector housing 202 defines at least one port 204 into which a proximal end 206 of a lead 208 with terminals 210 can be inserted, as shown by directional arrow 212.
- the connector housing 202 also includes a plurality of conductive contacts 214 for each port 204.
- the conductive contacts 214 can be aligned with the terminals 210 on the lead 208 to electrically couple the control module 102 to the electrodes (134 of Figure 1 ) disposed at a distal end of the lead 208.
- Examples of connectors in control modules are found in, for example, U.S. Patent No. 7,244,150 and U.S. Patent No. 8, 224, 450 .
- a connector 222 is disposed on a lead extension 224.
- the connector 222 is shown disposed at a distal end 226 of the lead extension 224.
- the connector 222 includes a connector housing 228.
- the connector housing 228 defines at least one port 230 into which a proximal end 232 of a lead 234 with terminals 236 can be inserted, as shown by directional arrow 238.
- the connector housing 228 also includes a plurality of conductive contacts 240.
- the conductive contacts 240 disposed in the connector housing 228 can be aligned with the terminals 236 on the lead 234 to electrically couple the lead extension 224 to the electrodes (134 of Figure 1 ) disposed at a distal end (not shown) of the lead 234.
- the proximal end of a lead extension is similarly configured and arranged as a proximal end of a lead.
- the lead extension 224 may include a plurality of conductive wires (not shown) that electrically couple the conductive contacts 240 to a proximal end 248 of the lead extension 224 that is opposite to the distal end 226.
- the conductive wires disposed in the lead extension 224 can be electrically coupled to a plurality of terminals (not shown) disposed on the proximal end 248 of the lead extension 224.
- the proximal end 248 of the lead extension 224 is configured and arranged for insertion into a connector disposed in another lead extension.
- the proximal end 248 of the lead extension 224 is configured and arranged for insertion into a connector disposed in a control module.
- a connector disposed in a control module As an example, in Figure 2B the proximal end 248 of the lead extension 224 is inserted into a connector 250 disposed in a control module 252.
- a patient may be experiencing pain emanating from an area greater in length than the length of an array of electrodes (e.g ., 134 of Figures 1 and 2 ) disposed on the distal end of a lead.
- a patient may experience pain in an area spanning multiple vertebral bodies.
- One way to increase stimulation coverage is to provide a lead with a greater length and either increase the amount of space between adjacent electrodes, or increase the size of one or more of the electrodes.
- linear electrode density may decrease to a sub-therapeutic level.
- Another way to increase stimulation coverage is to provide a lead with a greater length and increase the number of electrodes on the lead.
- a lead with additional electrodes may also need an increased number of conductive wires to electrically couple the electrodes to a control module.
- the lead may become incompatible with existing control modules. For example, the lateral circumference of the lead may too large to mate with a connector of a control module, or the number of terminals disposed on the lead may exceed the number of corresponding connective contacts disposed in the control module.
- One option for facilitating compatibility between a lead and a control module is to couple a proximal end of the lead to a lead adaptor that splits the conductive wires at the proximal end of the lead into two or more groupings of conductive wires that each couple with a control module.
- a lead includes a junction coupling the distal end of the lead with two or more proximal ends. Conductive wires disposed in the distal end of the lead are split at the junction into two or more groupings of conductive wires. Each grouping of conductive wires is disposed in a different proximal end. Each proximal end is configured and arranged to electrically couple at least one of the conductive wires disposed in the proximal end to at least one conductive contact disposed in a connector of a control module.
- each proximal end is coupled to a single connector of a single control module.
- Figure 3 is a schematic view of one embodiment of an electrical stimulation system 300 that includes a lead 302 and a control module 304.
- the lead 302 includes a plurality of electrodes 306 disposed at a distal end 308 and a plurality of terminals ( see e.g. , 714 and 716 in Figure 7 ) disposed on each of a plurality of proximal ends 310 and 312.
- a junction 314 couples the distal end 308 to the plurality of proximal ends 310 and 312.
- the junction 314 can be made using any non-conductive material suitable for implantation including, for example, silicone, polyurethane, PEEK, epoxy, and the like or combinations thereof. In at least some embodiments, the junction 314 may also provide mechanical sealing of any conductive wires disposed within the junction 314 to ameliorate current leakage.
- two proximal ends are shown as a representation of a plurality of proximal ends for clarity of illustration.
- the plurality of proximal ends includes a first proximal end and one or more second proximal ends.
- the plurality of proximal ends includes a first proximal end 310 and a second proximal end 312.
- at least one of the proximal ends is a continuation of a distal end and any other proximal end(s) terminate(s) at the junction.
- the first proximal end 310 is a continuation of the distal end 308 and the second proximal end 310 terminates at the junction 314.
- the lead can include more than two proximal ends. For example, there can be one, two, three, four, five, six, seven, eight, nine, ten, twelve, fourteen, sixteen, or more proximal ends. As will be recognized, other numbers of proximal ends may also be used.
- the control module 304 includes a connector 316 that defines a plurality of ports 318 and 320 configured and arranged to receive the first proximal end 310 and the second proximal 312.
- the number of ports is equal to the number of proximal ends of the lead 302.
- a plurality of conductor contacts 322 are disposed in each of the ports 318 and 320 and are configured and arranged to electrically couple the control module 304 to the electrodes 306.
- conductive wires are routed to either the first proximal end 310 or the second proximal end 312 at the junction 314.
- the length of the distal end 308 is substantially greater than the length of the first proximal end 310 and the second proximal end 312.
- the first proximal end 310 and the second proximal end 312 are also configured and arranged to couple with other devices, such as lead extensions, adaptors, operating room cables, and the like or combinations thereof.
- the ports 318 and 320 are shown arranged vertically on the control module 304. In alternate embodiments, the ports 318 and 320 are arranged in other orientations, such as side-by-side, or on different sides of the control module 304.
- the number of conductive wires disposed in the first proximal end 310 is approximately equal to the number of conductive wires disposed in the second proximal end 312.
- the lead 302 includes sixteen electrodes 306 electrically coupled with eight terminals ( see e.g. , 714 in Figure 7 ) disposed on the first proximal end 310 and eight terminals ( see e.g. , 716 in Figure 7 ) disposed on the second proximal end 312. Accordingly, in one embodiment, sixteen conductive wires are disposed in the distal end 308 of the lead 302 and are split into two groupings of eight conductive wires each at the junction 314.
- the corresponding connector 316 includes sixteen conductor contacts 322 configured and arranged with eight conductor contacts 322 disposed in each of the two ports 318 and 320 to electrically couple with the eight terminals disposed on each of the first proximal end 310 and the second proximal end 312 when the first proximal end 310 and the second proximal end 312 are inserted into the ports 318 and 320, respectively.
- Figure 4 is a schematic side view of one embodiment of a portion of a distal end of an exemplary conventional lead 402.
- the exemplary conventional lead 402 includes a plurality of electrodes 404, such as electrode 406, disposed on a distal end 408 of the exemplary conventional lead 402. Additional features of the exemplary conventional lead 402 are described below, with respect to Figure 6A , for comparison with at least some embodiments.
- Figure 5 is a schematic side view of one embodiment of a portion of a distal end of a lead 502 with a lateral circumference that is equal to the lateral circumference of the exemplary conventional lead 402, but that includes twice the number of electrodes from the exemplary conventional lead 402.
- the lead 502 includes a plurality of electrodes 504, such as electrode 506, disposed on a distal end 508 of the lead 502.
- the plurality of electrodes 504 is greater than the plurality of electrodes 404 in Figure 4 without a corresponding increase in the lateral circumference of the lead 502.
- the number of electrodes disposed on the lead 502 is twice the number of electrodes disposed on the exemplary conventional lead 402.
- the portion of the lead 502 distal to the junction (314 in Figure 3 ) is isodiametric.
- the lead 502 has a lateral nominal diameter of 0.053 inches (0.135 cm).
- Conductive wires may be used to electrically couple electrodes on a distal end of a lead to terminals on a proximal end of a lead.
- conductive wires may be embedded in the non-conductive material of the lead or can be disposed in one or more lumens extending along the lead. In some embodiments, each individual conductive wire is disposed in an individual lumen.
- Figure 6A is a schematic transverse cross-sectional view of the distal end of the exemplary conventional lead 402 shown in Figure 4 .
- the exemplary conventional lead 402 includes a center lumen 602 and a plurality of outer lumens 604-611.
- Each outer lumen 604-611 is configured and arranged for an individual conductive wire to extend along the length of each individual outer lumen 604-611.
- eight circular-shaped outer lumens 604-611 are shown.
- eight connector wires can be disposed in the outer lumens 604-611 and electrically coupled to eight electrodes.
- Figure 6B is a schematic transverse cross-sectional view of one embodiment of the distal end of the lead 502.
- the lead 502 includes a center lumen 612 and a plurality of outer lumens 614-621.
- Each outer lumen 614-621 is configured and arranged for multiple conductive wires to extend along the length of each individual outer lumen 614-621.
- eight oval-shaped outer lumens 614-621 are shown, with each outer lumen 614-621 configured and arranged for two conductive wires to extend within each outer lumen 614-621.
- sixteen connector wires can be disposed in the outer lumens 614-621 and electrically coupled to sixteen electrodes.
- outer lumens can be configured and arranged to accommodate additional conductive wires. Accordingly, the number of multiple conductive wires that can be disposed in an outer lumen may vary. For example, there can be one, two, three, four, five, six, seven, eight, nine, ten, twelve, fourteen, sixteen, or more conductive wires disposed in an outer lumen. As will be recognized, other numbers of conductive wires may also be disposed in an outer lumen.
- Figure 7 is a schematic perspective view of one embodiment of a lead 702 with a junction 704 coupling a distal end 706 with electrodes 708 disposed on the distal end 706 to a first proximal end 710 and a second proximal end 712.
- the first proximal end 710 includes terminals 714 disposed on the first proximal end 710 and the second proximal end 712 includes terminals 716 disposed on the second proximal end 712.
- the first proximal end 710 and the second proximal end 712 are each configured and arranged for insertion into one of a plurality of ports defined in a connector that is electrically coupled to a control module.
- the number of terminals 714 disposed on the first proximal end 710 is equal to the number of terminals 716 disposed on the second proximal end 712.
- the collective number of terminals 714 and 716 disposed on both the first proximal end 710 and the second proximal end 712, respectively, is equal to the number of electrodes 708 disposed on the distal end 706 of the lead 702.
- Figure 8A is a schematic side view of one embodiment of the junction 704 disposed on the lead 702.
- the junction 704 couples the distal end 706 with the first proximal end 710 and the second proximal end 712.
- the lateral diameter of the junction 704 is greater than the lateral diameter of the distal end 706 of the lead 702.
- a longitudinal schematic cross-sectional view of a conductive-wire branching region 802 is shown disposed within the junction 704.
- a plurality of conductive wires 804 are shown branching from the distal end 706 to each of the first proximal end 710 and the second proximal end 712.
- the number of conductive wires disposed in the distal end 806 is equal to the collective number of conductive wires disposed in both the first proximal end 808 and the second proximal end 810 and the number of conductive wires disposed in the first proximal end 808 is equal to the number of conductive wires disposed in the second proximal end 810.
- sixteen conductive wires are shown disposed in the distal end 806 that split evenly into eight conductive wires disposed in both the first proximal end 808 and the second proximal end 810. In other embodiments, other numbers of conductive wires may be used, as well.
- thirty-two conductive wires may be disposed in the distal end that split into a first proximal end and a second proximal end with sixteen conductive wires disposed in both the first proximal end and the second proximal end.
- thirty-two conductive wires disposed in the distal end may split into four proximal ends with eight conductive wires disposed in each of the proximal ends.
- Figure 8B is a schematic transverse cross-sectional view of one embodiment of the distal end 706 of the lead 702 disposed in the junction 704.
- the distal end 706 defines a central lumen 806 and a plurality of outer lumens, such as outer lumen 812.
- a plurality of conductive wires are disposed in each of the plurality of outer lumens, such as conductive wires 808 and 810 disposed in the outer lumen 812. Note that each of the conductive wires may be insulated to reduce the risk of short-circuiting.
- Figure 8C is a schematic transverse cross-sectional view of one embodiment of the first proximal end 710 and the second proximal end 712 disposed in the junction 704.
- the first proximal end 710 and the second proximal end 712 each define a central lumen 814 and 816, respectively, and a plurality of outer lumens, such as outer lumen 820.
- An individual conductive wire is disposed in each of the plurality of outer lumens, such as the conductive wire 818 disposed in the outer lumen 820. Note that each of the conductive wires may be insulated to reduce the risk of short-circuiting between two or more conductive wires within a given lumen.
- a junction may have a diameter that is greater than a distal end of a corresponding lead and may, therefore, prevent the use of conventional implantation techniques.
- Some conventional implantation techniques involve inserting an introducer needle, such as an epidural needle, into a patient. Once the introducer needle is inserted into the patient and positioned in a desired location, a lead is inserted into the introducer needle. Once the lead is fully inserted in the introducer sheath, the introducer needle is pulled out of the patient by sliding the introducer needle off the proximal end of the lead.
- a lead with one or more non-isodiametric sections such as a lead with a junction, may prevent the sliding of the introducer needle off the proximal end of the lead. It may be particularly advantageous to be able to employ such implantation techniques during a trial stimulation, when it is especially desired to position the lead using a minimally-invasive implantation technique that may be performed in an outpatient setting.
- a pull-apart implantation system can be used to facilitate implantation of an electrical stimulation system into a patient.
- Figure 9 is a schematic exploded perspective view of one embodiment of a pull-apart implantation system 900.
- the pull-apart implantation system 900 includes an introducer sheath 902, an insertion needle 904, and an obturator 906.
- the introducer sheath 902 has a proximal end 908 and a distal end 910 and includes a body 912 and at least two pull-apart tabs 914 and 916 disposed at the proximal end 908.
- the body 912 is coupled to the pull-apart tabs 914 and 916 and includes an open tip 918 at the distal end 910 of the body 912.
- the body 912 includes a lumen configured and arranged to receive the insertion needle 904 and the obturator 906 or the distal end of the lead ( see e.g. , 702 in Figure 7 ).
- the junction see e.g. , 704 in Figure 7 ) is too large to be insertable into the body 912.
- the introducer sheath 902 is made from a flexible material suitable for implantation into a patient including, for example, fluorinated ethylene propylene, polytetrafluoroethylene, high-density polyethylene, and the like or combinations thereof. Additionally, one or more radiopaque materials may be added including, for example, barium sulfate and bismuth subcarbonate, and the like or combinations thereof to facilitate implantation of the introducer sheath through the use of one or more medical imaging techniques, such as fluoroscopy.
- the insertion needle 904 can be made from a rigid material suitable for implantation, such as stainless steel, and has a proximal end 920 and a distal end 922 and may include a cannula 924 and a hub 926 disposed at the proximal end 920 of the insertion needle 904.
- the hub 926 may include a luer fitting 928 or other suitable arrangement configured and arranged to receive a syringe.
- the cannula 924 preferably has a longitudinal length that is at least as great as the body 912 of the introducer sheath 902 and configured and arranged for insertion into the body 912.
- the distal end of the cannula 924 extends through the open tip 918 of the body 912.
- the lateral circumference of the cannula 924 is no greater than sixteen-gauge.
- the cannula 924 is hollow and configured and arranged to receive the obturator 906.
- the junction see e.g. , 704 in Figure 7
- the obturator 906 has a proximal end 930 and a distal end 932 and includes an insertion rod 934 and a base 936.
- the insertion rod 934 is configured and arranged for insertion into the cannula 924 of the insertion needle 904 and includes a blunt tip configured and arranged for preventing coring of patient tissue when the insertion needle 904 is inserted into a patient.
- Figure 10 is a schematic perspective view of one embodiment of the pull-apart implantation system 900 with the insertion rod (934 in Figure 9 ) of the obturator (906 in Figure 9 ) disposed in the cannula (924 in Figure 9 ) of the insertion needle (904 in Figure 9 ) which, in turn, is disposed in the body 912 of the introducer sheath 902.
- the distal end 922 of the cannula (924 in Figure 9 ) is shown extending through the open tip 918 of the body 912.
- the body 912 includes one or more weakened regions 1002, such as score lines or perforations, extending along at least a portion of the longitudinal length of the body 912 from between the at least two pull-apart tabs 914 and 916.
- one or more weakened regions 1002 such as score lines or perforations, extending along at least a portion of the longitudinal length of the body 912 from between the at least two pull-apart tabs 914 and 916.
- the body 912 separates along the one or more weakened regions 1002.
- FIG 11 is a schematic exploded perspective view of another embodiment of a pull-apart implantation system 1100.
- the pull-apart implantation system 1100 includes an insertion needle 1102 and the obturator 906.
- the insertion needle 1102 includes a cannula 1104 and a hub 1106 disposed at a proximal end 1108 of the insertion needle 1102.
- the hub 1106 includes a luer fitting 1110 or other suitable arrangement configured and arranged to receive a syringe.
- the hub 1106 includes pull-apart tabs 1112 and 1114.
- FIG. 12 is a schematic perspective view of one embodiment of the pull-apart implantation system 1100 with the obturator (906 in Figure 10 ) disposed in the cannula 1104 of the insertion needle 1102.
- the cannula 1104 includes one or more weakened regions 1202, such as score lines or perforations, extending along at least a portion of the longitudinal length of the cannula 1104 from between the at least two pull-apart tabs 1112 and 1114.
- the cannula 1104 separates along the one or more weakened regions 1202.
- Figure 13 is a schematic perspective view of one embodiment of a splitable member 1302 with pull-apart tabs 1304 and 1306 on opposite sides of a proximal end 1308 of the splitable member 1302 that have been separated from one another.
- the splitable member 1302 is shown separated along approximately one third of the longitudinal length of the splitable member 1302.
- the splitable member 1302 is the introducer sheath 902.
- the splitable member 1302 is the insertion needle 1102.
- implantation of an electrical stimulation system using the pull-apart implantation system 900 begins by nesting the insertion needle 904 and the obturator 906 into the body 912 of the introducer sheath 902, as shown in Figure 10 .
- the introducer sheath 902 is then guided to a desired location within a patient. Once in proximity to the desired location, the obturator 906 is removed. Fluid may then be introduced or removed through the luer fitting 928 to check for precise positioning of the introducer sheath 902, for example, in an epidural space of the patient.
- the distal end ( see e.g. , 706 of Figure 7 ) of the lead ( see e.g. , 702 of Figure 7 ) is then inserted into the body 912 of the introducer sheath 902.
- the lead ( see e.g. , 702 of Figure 7 ) is inserted into the body 912 of the introducer sheath 902 until the distal end ( see e.g. , 706 of Figure 7 ) of the lead ( see e.g. , 702 of Figure 7 ) is positioned at the desired location.
- a stylet may be inserted into one or more lumens of the lead to facilitate insertion of the lead into the body 912 of the introducer sheath 902.
- the lead is positioned with the aid of one or more types of medical imaging, such as fluoroscopy.
- Implantation of an electrical stimulation system using the pull-apart implantation system 1100 begins by nesting the obturator 906 into the insertion needle 1102, as shown in Figure 12 .
- the insertion needle 1102 is then guided to a desired location within a patient. Once in proximity to the desired location, the obturator 906 is removed.
- fluid may then be introduced or removed through the luer fitting 928 to check for precise positioning of the insertion needle 1102, for example, in an epidural space of the patient.
- the distal end ( see e.g. , 706 of Figure 7 ) of the lead ( see e.g. , 702 of Figure 7 ) is then inserted into the cannula 1104 of the insertion needle 1102.
- the lead ( see e.g. , 702 of Figure 7 ) is inserted into the cannula 1104 of the insertion needle 1102 until the distal end ( see e.g. , 706 of Figure 7 ) of the lead ( see e.g. , 702 of Figure 7 ) is positioned at the desired location.
- a stylet may be inserted into one or more lumens of the lead to facilitate insertion of the lead into the cannula 1104.
- the lead is positioned with the aid of one or more types of medical imaging, such as fluoroscopy.
- FIG. 14A is a schematic perspective view of one example of the distal end 706 of the lead 702 disposed in the splitable member 1302 which, in turn, is disposed in a patient, as shown by a line of alternating dashes and dots 1402.
- the splitable member 1302 may be removed from the lead 702 by separating the splitable member 1302 along the one or more weakened regions (1002 in Figure 10 or 1202 in Figure 12 ) by separating the pull-apart tabs 1304 and 1306 from one another, as described above with reference to Figure 13 .
- Figure 14B is a schematic perspective view of one example of the splitable member 1302 being separated from the lead 702 by splitting the splitable member 1302 into a plurality of strips while pulling the splitable member 1302 proximally along the lead 702.
- the distal end (see e.g ., 908 of Figure 9 ) of the splitable member 1302 moves proximally along the distal end 706 of the lead 702, with an increasing amount of the distal end 706 of the lead 702 extending through the open tip ( see e.g ., 918 of Figure 9 ) of the splitable member 1302.
- the splitable member 1302 may be completely separated into two or more longitudinal strips, thereby separating completely from the distal end 706 of the lead 702 and also from the patient.
- the distal ends of the splitable member 1302 may be extracted from the patient as the splitable member 1302 is split apart.
- the splitable member may be split apart without causing the lead 702 to move.
- the proximal ends of the lead 706 can be coupled to a control module and implanted using well-known techniques, for example, using one or more using tunneling straws placed in passageways underneath patient skin with bores that are sized large enough to receive a junction and the proximal ends of the lead.
- One or more tunneling straws each have an inner diameter of 0.18 inches (0.46 cm).
- the proximal ends of a lead can be coupled to a connector of a control module, as shown in Figure 3 .
- One or more of the proximal ends can be coupled to one or more other devices, including an adaptor, a lead extension, an operating room cable, or the like or combinations thereof.
- FIG. 15 is a schematic overview of one embodiment of components of an electrical stimulation system 1500 including an electronic subassembly 1510 disposed within a control module. It will be understood that the electrical stimulation system can include more, fewer, or different components and can have a variety of different configurations including those configurations disclosed in the stimulator references cited herein.
- power source 1512 can be used including, for example, a battery such as a primary battery or a rechargeable battery.
- a battery such as a primary battery or a rechargeable battery.
- other power sources include super capacitors, nuclear or atomic batteries, mechanical resonators, infrared collectors, thermally-powered energy sources, flexural powered energy sources, bioenergy power sources, fuel cells, bioelectric cells, osmotic pressure pumps, and the like including the power sources described in U.S. Patent Application Publication No. 2004/0059392 .
- power can be supplied by an external power source through inductive coupling via the optional antenna 1518 or a secondary antenna.
- the external power source can be in a device that is mounted on the skin of the user or in a unit that is provided near the user on a permanent or periodic basis.
- the battery may be recharged using the optional antenna 1518, if desired. Power can be provided to the battery for recharging by inductively coupling the battery through the antenna to a recharging unit 1316 external to the user. Examples of such arrangements can be found in the references identified above.
- a processor 1504 is generally included to control the timing and electrical characteristics of the electrical stimulation system. For example, the processor 1504 can, if desired, control one or more of the timing, frequency, strength, duration, and waveform of the pulses. In addition, the processor 1504 can select which electrodes can be used to provide stimulation, if desired. In some embodiments, the processor 1504 may select which electrode(s) are cathodes and which electrode(s) are anodes. In some embodiments, the processor 1504 may be used to identify which electrodes provide the most useful stimulation of the desired tissue.
- Any processor can be used and can be as simple as an electronic device that, for example, produces pulses at a regular interval or the processor can be capable of receiving and interpreting instructions from an external programming unit 1508 that, for example, allows modification of pulse characteristics.
- the processor 1504 is coupled to a receiver 1502 which, in turn, is coupled to the optional antenna 1518. This allows the processor 1504 to receive instructions from an external source to, for example, direct the pulse characteristics and the selection of electrodes, if desired.
- the antenna 1518 is capable of receiving signals (e.g., RF signals) from an external telemetry unit 1506 which is programmed by a programming unit 1508.
- the programming unit 1508 can be external to, or part of, the telemetry unit 1506.
- the telemetry unit 1506 can be a device that is worn on the skin of the user or can be carried by the user and can have a form similar to a pager, cellular phone, or remote control, if desired.
- the telemetry unit 1506 may not be worn or carried by the user but may only be available at a home station or at a clinician's office.
- the programming unit 1508 can be any unit that can provide information to the telemetry unit 1506 for transmission to the electrical stimulation system 1500.
- the programming unit 1508 can be part of the telemetry unit 1506 or can provide signals or information to the telemetry unit 1506 via a wireless or wired connection.
- One example of a suitable programming unit is a computer operated by the user or clinician to send signals to the telemetry unit 1506.
- the signals sent to the processor 1504 via the antenna 1518 and receiver 1502 can be used to modify or otherwise direct the operation of the electrical stimulation system.
- the signals may be used to modify the pulses of the electrical stimulation system such as modifying one or more of pulse duration, pulse frequency, pulse waveform, and pulse strength.
- the signals may also direct the electrical stimulation system 1500 to cease operation, to start operation, to start charging the battery, or to stop charging the battery.
- the stimulation system does not include an antenna 1518 or receiver 1502 and the processor 1504 operates as programmed.
- the electrical stimulation system 1500 may include a transmitter (not shown) coupled to the processor 1504 and the antenna 1518 for transmitting signals back to the telemetry unit 1506 or another unit capable of receiving the signals.
- the electrical stimulation system 1500 may transmit signals indicating whether the electrical stimulation system 1500 is operating properly or not or indicating when the battery needs to be charged or the level of charge remaining in the battery.
- the processor 1504 may also be capable of transmitting information about the pulse characteristics so that a user or clinician can determine or verify the characteristics.
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Claims (13)
- Kit d'insertion, comprenant :une dérivation de neurostimulation (702) avec une extrémité distale (706) et au moins deux extrémités proximales (710, 712), ladite dérivation de neurostimulation comprenantune pluralité d'électrodes (708) disposées à l'extrémité distale,une pluralité de bornes (714, 716) disposées aux extrémités proximales,une pluralité de fils conducteurs reliant électriquement la pluralité d'électrodes à la pluralité de bornes,un raccord (704) reliant l'extrémité distale de la dérivation de neurostimulation aux extrémités proximales de la dérivation de neurostimulation,où la pluralité de fils conducteurs disposés à l'extrémité distale de la dérivation de neurostimulation est divisée au niveau du raccord en au moins deux ensembles de fils conducteurs, et où chacun des ensembles de fils conducteurs est disposé dans une extrémité proximale différente,où chacune des extrémités proximales est configurée et agencée pour relier électriquement au moins un fil conducteur disposé dans l'extrémité proximale à au moins un contact conducteur disposé dans un connecteur d'un module de commande, etune pluralité de lumières est définie dans l'extrémité distale, ladite pluralité de lumières définie dans l'extrémité distale comprenant une lumière centrale (806) et une pluralité de lumières externes (812), au moins deux fils de la pluralité de fils conducteurs étant disposés dans chaque lumière de la pluralité de lumières externes définie dans l'extrémité distale, etune pluralité de lumières est définie dans chacune des au moins deux extrémités proximales, ladite pluralité de lumières définie dans chacune des au moins deux extrémités proximales comprenant une lumière centrale (814, 816) et une pluralité de lumières externes (820), un fil conducteur individuel de la pluralité de fils conducteurs étant disposé dans chaque lumière de la pluralité de lumières externes définie dans les au moins deux extrémités proximales,où la pluralité de lumières définie dans l'extrémité distale se confond au niveau du raccord avec la pluralité de lumières définie dans chacune des au moins deux extrémités proximales ; etun élément séparable est configuré et agencé pour recevoir la dérivation de neurostimulation lors de l'implantation de la dérivation de neurostimulation sur un patient,l'élément séparable définissant une lumière pour recevoir l'extrémité distale de la dérivation de neurostimulation, l'élément séparable étant configuré et agencé pour se séparer en au moins deux parties pour le retrait de l'élément séparable de la dérivation de neurostimulation par implantation de la dérivation de neurostimulation sur le patient.
- Kit d'insertion selon la revendication 1, où l'élément séparable comprend une aiguille d'insertion (904).
- Kit d'insertion selon la revendication 1, où l'élément séparable comprend une gaine d'introduction (902).
- Kit d'insertion selon la revendication 3, comprenant en outre une aiguille d'insertion configurée et agencée pour disposition dans la lumière de l'élément séparable.
- Kit d'insertion selon la revendication 1, où l'élément séparable a une extrémité proximale et une extrémité distale, ledit élément séparable comprenant au moins deux languettes détachables (914, 916) disposées sur des côtés opposés de l'extrémité proximale.
- Kit d'insertion selon la revendication 5, où l'élément séparable comprend en outre un corps (912) s'étendant depuis l'extrémité distale vers les au moins deux languettes détachables ; et
au moins une zone de fragilisation (1002) s'étendant le long d'au moins une partie d'une longueur longitudinale du corps de l'élément séparable depuis l'intersection des au moins deux languettes détachables, ladite ou lesdites zones de fragilisation étant configurées et agencées pour rompre quand les au moins deux languettes détachables sont séparées l'une de l'autre dans des directions sensiblement orthogonales au corps de l'élément séparable. - Kit d'insertion selon la revendication 6, où la ou les zones de fragilisation comprennent une ligne d'entailles et/ou une ligne de perforations.
- Kit d'insertion selon la revendication 1, comprenant en outre un obturateur (906) configuré et agencé pour disposition dans l'élément séparable.
- Kit d'insertion selon la revendication 1, comprenant en outre
un module de commande configuré et agencé pour être relié à la première extrémité proximale et à la ou aux deuxièmes extrémités proximales, ledit module de commande comprenant
un boîtier, et
un sous-groupe électronique (1510) disposé dans le boîtier ; et
un connecteur pour recevoir la dérivation de neurostimulation, ledit connecteur comprenant
un boîtier de connecteur définissant un premier orifice pour recevoir la première extrémité proximale et au moins un deuxième orifice pour recevoir la ou les deuxièmes extrémités proximales de la dérivation de neurostimulation, et
une pluralité de contacts de connecteur disposés dans le boîtier de connecteur, lesdits contacts de connecteur étant configurés et agencés pour être reliés à au moins une première borne disposée à la première extrémité proximale de la dérivation de neurostimulation et à au moins une deuxième borne disposée à chaque extrémité de la ou des deuxièmes extrémités proximales. - Kit d'insertion selon la revendication 1, où le nombre total de bornes disposées sur chacune des extrémités proximales est égal au nombre d'électrodes disposées sur l'extrémité distale.
- Kit d'insertion selon la revendication 1, où les bornes sont disposées en nombre égal sur chacune des extrémités proximales.
- Kit d'insertion selon la revendication 1, où le nombre de fils conducteurs disposés dans l'extrémité distale est égal au nombre total de fils conducteurs disposés dans les au moins deux extrémités proximales.
- Kit d'insertion selon la revendication 1, où les au moins deux extrémités proximales comprennent une première extrémité proximale et une deuxième extrémité proximale, et où le nombre de fils conducteurs disposés dans la première extrémité proximale est égal au nombre de fils conducteurs disposés dans la deuxième extrémité proximale.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US12/203,674 US7941227B2 (en) | 2008-09-03 | 2008-09-03 | Implantable electric stimulation system and methods of making and using |
PCT/US2009/054897 WO2010027787A2 (fr) | 2008-09-03 | 2009-08-25 | Système de stimulation électrique implantable et procédés de fabrication et d'utilisation |
Publications (2)
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EP2355892A2 EP2355892A2 (fr) | 2011-08-17 |
EP2355892B1 true EP2355892B1 (fr) | 2015-10-21 |
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Application Number | Title | Priority Date | Filing Date |
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EP09791889.0A Active EP2355892B1 (fr) | 2008-09-03 | 2009-08-25 | Système de stimulation électrique implantable |
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US (1) | US7941227B2 (fr) |
EP (1) | EP2355892B1 (fr) |
AU (1) | AU2009288344B2 (fr) |
CA (1) | CA2734668C (fr) |
WO (1) | WO2010027787A2 (fr) |
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WO2010027787A3 (fr) | 2010-07-08 |
AU2009288344B2 (en) | 2015-03-19 |
EP2355892A2 (fr) | 2011-08-17 |
US20100057176A1 (en) | 2010-03-04 |
AU2009288344A1 (en) | 2010-03-11 |
CA2734668A1 (fr) | 2010-03-11 |
WO2010027787A2 (fr) | 2010-03-11 |
CA2734668C (fr) | 2014-01-28 |
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